840536004 has 72 divisors (see below), whose sum is σ = 2488879008. Its totient is φ = 218319360.

The previous prime is 840535987. The next prime is 840536009. The reversal of 840536004 is 400635048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840536009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58509 + ... + 71444.

It is an arithmetic number, because the mean of its divisors is an integer number (34567764).

Almost surely, 2^840536004 is an apocalyptic number.

840536004 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

840536004 is an abundant number, since it is smaller than the sum of its proper divisors (1648343004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

840536004 is a wasteful number, since it uses less digits than its factorization.

840536004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129985 (or 129976 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 840536004 is about 28991.9989652318. The cubic root of 840536004 is about 943.7394440934.

The spelling of 840536004 in words is "eight hundred forty million, five hundred thirty-six thousand, four".